I'm just curious. Dumbledore sometimes appears to be...Bored. He just kinda swims back and forth of his tank (all over the tank not just at the bottom so I know he isn't sick) sometimes with bursts of energy, wiggling and twisting, visits his bubble nest, swims through his log, stops and begs for food then repeats. Is there anything I can do for him to give him a little more...Activity? Or is that just kinda what bettas do? I've heard of bottle caps, but I'm not familiar with it.